Variable driving mechanism



(No Model.) I 2 Sheets-Sheet 1.,

E. 15''. AUTENRIETH.

VARIABLE DRIVING MECHANISM.

No. 395,258. 4 Patented Dec. 25, 1888...

@V/Zeewea: Ingenfir: v M W M (No Model.) 2 Sheets-Sheet 22.,

E. F. AUTENRIETH.

VARIABLE DRIVING MECHANISM.

No. 395,258. Patented Dec. 25, 1888..

Z MACHINE COMPANY, OF NEXY YORK.

NITED STATES ATENT rrrcn.

ERNST F. AUTENRIETH, OF NE\V YORK, N. Y., ASSIGNOR TO THE GLEN. COVE VARIABLE DRIVING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 395,258, elated December 25, 1888.

Application filed August 13,1888. Serial No. 282,679. (No model.)

To all whom it may concern: An expanding and contracting pulley, Be it known that I, ERNST F. AUTENRIETH, is fixed upon the driving-shaft A, and in of the city and county of New York, in the line therewith on the driven shaft B is State of New York, have invented a new and fixed another expanding and contracting pul- 5 useful Improvement in Variable Driving ley, I). Eachof the pulleys C and 1) consists Mechanism for Machinery, of which the folof aseries of sectordike members, I), and delowing is a specification, reference being had vices for moving the said members toward to the accompanying drawin and from the centers of their respective shafts.

This invention relates to variable driving The said devices are so connected with each 1o mechanism applicable in connection with exother that when one of said devices is moved panding pulleys which are composed of a .in a direction to spread or expand its said series of sector-like members and devices for members the other is moved in a direction to producing the spreading apart or expanding draw together or contract its said members. and the contracting or drawing together of E and F are sliding hubs or collars on the 15 said members. shafts A and B, respectively, each of which I will now proceed to describe the improvehubs or collars is connected by rods a with ment with reference to the drawings, and the several members Z) of the corresponding will afterward point out its novelty in claims. pulley, whereby the said members may be Figure 1 represents a plan view of certain spread and contracted by sliding the corre- 20 parts of a woodplaning machine having a sponding hub or collar back and forth on its variable driving mer'hanism embodying my shaft, and the said hubs are so connected improvement applied tl'iereto. Fig. 2 reprewith each other that when one of said hubs sents a side view corresponding to Fig. 11; and or collars is moved in a direction to spread or Fig.3,a side view,partlyin section,correspondexpand the members I) of its pulley the other 2 5 ing to Figs. 1. and i,with certain parts removed. hub or collar will be moved in a direction to Like letters of reference indicate corre contract the members I) of its pulley. sponding parts in the several figures. G and H are two forked bell-crank levers, N designates the frame of the planing-niaone for each of the sliding hubs E and F, the chine, A the driving-shaft, and 13 a driven forked arms I of said levers respectively en o shaft. gaging with its sliding hub or collar.

0 designates two pairs of fQt5Ll-l0llGl'S, and I is a rod by which the straight arms m of 1- a system of slmr-gearing through which thesaidleversare connected together,whereby and the back gearing, Q, motion is communithe sector-like members are moved simultacated to the feed-rollers by a spur-wheel, c, neously. The position of said bell-cranksrel- 35 on the driven shaft 13. atively to the respective hubs or collars is R is an adjustable cutter-head, the shaft (1 reversed in this example by placing both of which is provided with a driven pulley, c, bell-crank levers between the axles A and B, and is carried in bearing-boxes, f, in inclined whereby when the rod I is moved in a direcguidcb1.'ackcts, g attached to the frame N. tion to expand one pulley the other pulley o 40 The construction and arrangement of the will be contracted.

above-mentioned parts of the wood-planing In the example represented in the drawmachine are well known and in common use ings the expanding and contracting pulleys in such machines, the motive power being 0 and D are of a construction described in derived from an endless belt, to receive which my application for Letters Patent, Serial No. 5 5 the driving-shaft A provided with a fast 281,009, filed July 25, 1888, the sector-like pulley, 71 and a loose pulley, It. The cuttermembers or segments Z) being fitted to slide head is driven by a belt, 2', (shown in dotted on face-plates n in tangentiallyarranged lines in Fig. 2,) passing around the pulley j on guides or guide-slots o in said faceplate, the the drivingshaft A and over a guide-pulley, hubs or collars E and F being fitted to turn 50 is, carried on a stuchlc, projecting from the with and slide upon the axles toward and frame N. from said face-plates, and the rods to being '2 sgaes pivotally connected with said members Z) and hubs E and F to move in planes tangential, respectively, to a circle concentric with the corresponding faceplate and shaft. The sliding hubs or collars are prevented from turning on the respective shafts by feathers p in the shafts and corresponding grooves in the hubs or collars.

The hubs or collars E and F are provided with grooved heads q, into which .forks 9' are fitted, said forks 7' being pivotally attached to the forked arms of the bell-cranks by pivotpins 8, and the engagement of the bell-cranks with the hubs or collars is thereby effected.

A screw-shaft, J, is carried in bearings f on the frame N, and has a nut, K, and a handwheel thereon. M designates a lever pivoted to frame N by a fulcrum pin or stud, u. The lever M is forked at one end to embrace the nut K, and the parts of the forked ends are slotted to engage lugs or pins to, which project from opposite sides of the nut. The other end is pivotally attached to the rod I by engaging with a socket-piece, r, on said rod I.

hen the shaft J is revolved in either direction, the nut K is moved longitudinally thereon and moves the lever M, and consequently the rod I, according to the direction in which the said shaft J is revolved, thereby simultaneously contracting one of the pulleys O or D and expanding the other. The driven pulley D is operated by a belt, 10, from the driving-pulley C. \Vhen it is necessary to increase the speed of the driven pulley, that pulley is contracted, while the driving-pulley is enlarged. To diminish the speed of the driven pulley, it enlarged or expanded, while the driver is contracted. The circumference of one being increased as much as that of the other is reduced, the same length of belt is always required, whatever may be the changes in the relative proportion of one circumference to the other produced by the shifting mechanism.

To provide for any possible irregularities in the expansion and contraction of the driv in g and driven pulleys, a tightenin or tension pulley, w, is provided, which, by its unbalanced weight on the belt, will maintain a practically uniform strain or tension of said belt. The tension-pulley is attached to one end of an arm, 10 the other end of which projects from a shaft pivoted to frame'N at 10 and provided with a hand-lever, w, by which the pulley 10 may be lifted up off of the belt w.

By combining the two expanding pulleys and a connection whereby one expands as the other contracts the increasing centrifugal force developed in the one that expands is counteracted or counterbalanced bythe diminishing centrifugal force of the one that contracts.

\Vhat I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a driving-shaft and a driven shaft and two expansible and contractible pulleys, one on each shaft, each consisting of a series of sector-like members, and a sliding hub or collar on each of said shafts connected by rods with the sector-like members of the pulley thereon, of two forked bell-crank levers, one for each sliding hub or collar and fulcrumed on a fixed support, the forked arms of said levers respectively engaging with its sliding hub or collar, and a rod connecting the straight arms of said levers, whereby the sector-like members are moved simultaneously, the position of said bellcranks relatively to the respective hubs or collars being reversed, whereby when the rod is moved in a direction to expand the sectorlike members of one pulley the members of the other pulley will be contracted, substantially as specified.

2. The combination, with the driving-shaft A, the driven shaft B, the expansible and contractible pulleys C and D, and the sliding hubs or collars E and F on said shafts, and-the rods a, connecting said hubs or collars to the'sector-like members 1) of said pulleys, of the reversed bell-crank levers G and H, engaging said hubs or collars, respectively, the rod 1, connecting said bell-cranks with each other, the screw-shaft J and nut K, and hand-wheel L on said screw-shaft, and the lever M, pivotally connected at one end with the nutK and at the other end with the rod I, all substantially as specified, and for the purpose set forth.

ERNST F. AUTEIRIETH.

\Vitnesses:

MINER'T H. LINDEMAN, FREDK. HAYNES. 

